Means for preventing displacement of rollers-in



P. A. E. ARMSTRONG MEANS FOR PREVENTING DISPLACEMENT OF ROLLERS IN ROLLER BEARINGS Filed Sept. 28. 1920 2 (O ze INVENTOR ATTORNEY Patented Get. 9, 1923.

UNITED stares v 1,459,991 PATENT OFFICE. j

' PERCY A. n. rinusraone, or LOUDONVILLE,- new YORK.

MEANS For; PREVENTING DISPLACEMENT for RoLLEnsrn notions BEARINGS.

. Application filed September 28, 1920. set-1211110413338.

To all whomit may concern Be it vknown that I, PERCY A. E. ARM- srRo o, a subject of the King of Great Britain, and. residing at Loudonville in the countyof Albany, State of New York, have invented certainnew and useful Improvefmentsin Means for Prei' enting Displace .ings.

ment of Rollers in Roller Bearings, of which the following is aspecification.

My invention relates to means for preventing. displacement :of

The invention relates more particularly to roller bearings having rollers with curvedsurfaces, and having at least one bearing member provided with a curved bearingsurface.

With curved rollers, which have different diameters in different parts of their length,

' lengthwis displacement thereof relative to a curved bearing surface may result in the introduction, between parts of the bearing 7 rings or members, of a roller section having age of the hearing may result. ency becomes more marked as the difference betw'een'the curvature of rollers and a diameter greater than the available space. In this way binding or seizing or even break- This tendraces is increased.

The present invent1on has for its ob ect the provision of meansfor preventing such disp aceinent of the rollers with respect to tional view of a bearing embodying one form of the invention and Figs. 2, 3 and 4 are detail sectional views of some modified forms. V r

The bearing. illustratedhas an outer bearing ring 10, with curved bearing surface 11, and aninner bearing ring-lil, with a spherical bearing surface. [The rollers 14 havethe concaved surface 15 with a curvature some what greater than the curvature of the bearing member and adapted to make con-' tact with the bearing surfaces of the bearing members in a narrow-zone, regionor point. Whe'n' jtheubearing is under substantial load such bearing region is increased in width.

rollers in roller bean,

as takes place load over'a wider area. This relation may be referred'for convenience of statement as point contact when not under load. and line contact under load. The linecontact under load is, however, not of suflicient length to produce appreciable departure from rolling contact over the entire bearing area nor to result in appreciable sliding action between the surfaces. As will be apparent, the

greatest pressures areimpose'd' at and near the center of the line contact area when under load and the contact pressures'decrease on either side thereof as the edges or limits of the line contact area are approached.

The means for preventing longitudinal displacement of the rollers in the form shown is provided on the outer bearing ring or member. In Fig. 1 such outer bearing;

member 10 is provided with inwardly extending flanges 17 which are provided with an outward flare or taper 18, adapted to bear against the end of the roller 14: which is provided with extensions 19 having a similar flare or taper 20. The line of contact 21 is preferably substantially opposite, or in other words at substantially the same radial distance from the bearing center as the bearing region 16 of the roller 14 on the outer bearing member 10, making any contact between the roller and the flange a sub stantially rolling contact. I i

The slightly modified form of Fig. 2 has the ends of the rollers 14? rounded off as shown at 22 and the flanges 23 on bearing member 10 having contact surfaces 2a of rounded form tocooperate therewith.

,In the form shown in Fig. .3, the bearing ring 1O has longer flanges 25 adapted to bear centrally against the rollers 14:", here shown as provided with rounded end portions 26.

r In the form shown in Fig. 4 the bearing member 10 is provided between its sides with a pair of inwardly extending flanges 27, which enter grooves 28 in the roller 14. 'In all cases relief grooves 29 are preferably cut in the bearing member on each side of the bearing surface so that there shall be no contact between the roller and the bearingmember in such region.

Itwill be seen that the invention provides as compared to the condition when not under load, this beingdue to the elasticity oi" the metal and such slight give under load, which results in distributing the simple and efficient means for guarding against binding or seizing of the hearing by preventing the longitudinal movement or V displacement, of the rollers relative to their bearing surfaces. I The invention may be embodied 1n various 'forms and is not limited "to the particular embodiment illustrated.

vbroad flanges on the outer bearing member adapted to make substantially axial engage Vment' With the ends of the rollers and to .therebvf prevent longitudinal displacement thereof relativeto the, bearing-'members.

2. Ina roller bearing,- curved rollers, 1n-

ner, and outer bearing members, the inner bearing member being spherical, and means on the outer bearing member adapted to engagewith the rollersat substantially the axes thereof to prevent longitudinal clis-, placement thereof with:respect to the outer bearing member. V 3. In a rollerbearing, curved rollers havmg substantially axially extending portions I in at their ends inner and outer bearing members, the outer member having curved' bear- 7 m surfaces, and means on the outer bearing member for engaging said rollers by their ends at substantially thea-Xes'thereof to pre vent longitudinal displacement thereof; In witness whereof I have signed my name hereto. a l PERCY A. ARMSTRONG. 

